Flow-Encode
Only Phase Contrast Magnetic Resonance Imaging

1Radiology,
NorthShore University HealthSystem, Evanston, IL, United States; 2Siemens
Healthcare, Chicago, IL, United States; 3Radiology, Feinberg
School of Medicine, Northwestern Univeresity, Chicago, IL, United States; 4Radiology,
Pritzker School of Medicine, University of Chicago, Chicago, IL, United
States

Flow-encode only (FEO) is a new time-resolved phase
contrast (PC) method that benefits from a doubled time resolution over the
traditional PC method, and does not require background phase correction. FEO
quantifies blood-flow velocity by performing only flow-encoded acquisitions.
FEO was compared to the traditional PC method in ten volunteers and two
patients with peripheral artery disease. Flow measurements were compared
between methods with flow profiles, linear correlation, and Bland-Altman
analysis.Net flow, peak flow, reverse
flow, and average flow metrics were compared as well. Blood-flow measurements
showed no statistically significant difference between methods (paired
t-test, p > 0.05).